泥沙俱下

níshājùxià
  1. mud and sand flow together (idiom)
  2. good and bad mingle

CEDICT

泥土和沙子随着河流冲下来。比喻人或事物不论好坏均溷杂一起。

重編國語辭典

比喻好的和坏的均溷杂在一起

維基詞典

Entry Composition

1 泥沙 níshā silt
2 俱 jù
  1. (literary) all; both; entirely; without exception
  2. (literary) to be together
  3. (literary) to be alike
3 下 xià
  1. down
  2. downwards
  3. below
  4. lower
  5. later
  6. next (week etc)
  7. second (of two parts)
  8. to decline
  9. to go down
  10. to arrive at (a decision, conclusion etc)
  11. measure word to show the frequency of an action